What is the correct prefix for 6?

hex-

Explanation:

PrefixPrefix meaningSample word

hex-          6                                  hexapod: having six legs, an insect, for      

                                                                   example.

The Sun isn't actually yellow; it's just an illusion caused by the Earth's atmosphere.The filtered blue light refracts from atmospheric molecules, causing the blue appearance of our sky. During times of sunrise and sunset, the colors of the Sun appear warmer than usual; this means orange or red instead of yellow.